During an interview in Beijing, directors Joe and Anthony Russo confirmed that Black Widow played by Scarlett Johansson will appear in Captain America: Civil War (via CBM). Here's what Anthony Russo said:
"We've been preparing for the movie since the last one debuted last year,".
"So, we've been working on it for a long time now. We're very happy how it's coming along. Captain America 3 is going to be called Captain America: Civil War,and it's going to star Chris Evans. Scarlett Johansson will be back, Winter Soldier will be back, and Robert Downey Jr. as Iron Man will also be joining us in the next film."
So if the movie is taking any sort of inspiration from its awesome comic book source material, Marvel’s Civil War event comic, then there’s a pretty great chance Black Widow won’t be the only other Avenger appearing in the film. And hopefully we get to see a lot of Avengers in the film! I'm defiantly hoping to see Thor!!
Captain America: Civil War begins filming in April, and opens May 6, 2016.